ASUS WS C621E SAGE accommodates up to four dual-width graphic cards with a four true PCIe Gen3 x16 link to unleash maximum graphic performance. With support for up to 4-way NVIDIA® SLI™, AMD CrossFireX™, and 2-Way NVIDIA Quadro® SLI™, WS C621E SAGE is an excellent choice for content creators, mechanical or architectural engineers, and anyone with processing-intensive workloads.